A good GUI design removes the impediment of communication with the computer system and allows the user to work genograma.top directly on the problem at hand . It solves the blank screen problem that confronted early computer users .
2 Graphical User Interface
This research has direct impact on GUI design, especially concerning the number of menu items and icons. At a conceptual level, a computer human interface is a «means by which people and computers communicate with each other» . One can make an analogy between a computer system’s GUI and a car’s steering wheel. The wheel directly binds the driver to the operation and functionality of the vehicle. When driving, a driver should not have to concentrate on the steering wheel. In the same way, the GUI binds the user of the computer system to the operation and potential of the computer system .
These early users sat down in front of a computer and faced a blank screen, with only a prompt. The computer gave the user no indication what the user was to do next. The GUI familiar to most of us today in either the Mac or the Windows operating systems and their applications originated at the Xerox Palo Alto Research Laboratory in the late 1970s. Later, Microsoft used many of the same ideas in their first version of the Windows operating system for IBM-compatible PCs. Widgets, also known as controls, are the graphical control elements through which the user interacts with a GUI. These control elements require direct manipulation from users so they can read or edit information in the application.
Proper grouping results in a necessary redundancy of selection information that aids the user. For example, if the user knows where one item in a group is on a screen, he will expect other like items to be there also. If one groups the items in line with this expectation, it allows for accurate locating and better transfer of information to the user. Once the user has a desired fixation point, there is a limit to the amount of information that the person can process at one time. A GUI design rule of thumb is that the range of options or choices should never be more than five or six .
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Examples of such controls include buttons, scroll bars and checkboxes. Some environments use the methods of 3D graphics to project virtual three-dimensional user interface objects onto the screen. As the processing power of computer graphics hardware increases, this becomes less of an obstacle to a smooth user experience. In 1984, Apple released a television commercial which introduced the Apple Macintosh during the telecast of Super Bowl XVIII by CBS, with allusions to George Orwell’s noted novel Nineteen Eighty-Four.
What was used before GUI?
Before GUI, computers looked like bulky big machine typewriters. Computers also didn’t have a screen for quite sometime and when they came out it was just a small screen that didn’t show much.
Miller showed that absolute identification using one-dimensional criteria was about seven items, plus or minus two. Miller introduced the concept of recoding as a method that people use to store information. Miller also pointed out that by expanding the identification criteria from one to more dimensions people could handle more choices and remember more. Later researchers expanded on Miller recoding to develop the concept that people chuck information together in order to remember more information .
What is meant by Cui?
Character User Interface (CUI) is a kind of user interface that uses only alphanumeric characters and pseudographics for input-output and presentation of information. It is characterized by a low demand for I/O hardware resources (in particular, memory) and high information display speed.